Stack thickness measuring gauge



FIG. 1 is a perspective view of a stack thickness measuring gauge, as seen from the front and one side, showing my new design;

FIG. 2 is an elevational view thereof, as taken from the other side, the two sides being mirror images of each other;

FIG. 3 is is a top plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a bottom plan view thereof.

Being shown in an arbitrary orientation for illustrative purposes, the stack thickness measuring gauge is useful also in different orientations. In FIG. 1, broken-line showings of a user's hand and of a stack of sheets are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a stack thickness measuring gauge, as shown and described. 